Updated version number in Sphinx documentation to v0.2.
Updated version number in Sphinx documentation to v0.2.

daviddeng/azrael,olitheolix/azrael,daviddeng/azrael,daviddeng/azrael,daviddeng/azrael,olitheolix/azrael,olitheolix/azrael,olitheolix/azrael,olitheolix/azrael,daviddeng/azrael